ladder orders!

src/components/Btn.vue

@@ -1,6 +1,6 @@
 <template>
   <v-btn variant="outlined">
-    <v-icon v-if="icon" :icon="icon" :color="color"></v-icon>&nbsp;
+    <v-icon v-if="icon" :icon="icon" :color="color"></v-icon>&nbsp{{text}}
     <slot/>
   </v-btn>
 </template>
@@ -10,7 +10,7 @@ import {useStore} from "@/store/store";
 import {useAttrs} from "vue";
 
 const s = useStore()
-const props = defineProps(['icon', 'color'])
+const props = defineProps(['icon', 'color', 'text'])
 const attrs = useAttrs()
 
 </script>

src/components/LadderOrder.vue

@@ -1,22 +1,96 @@
 <template>
-  <order :tranches="buildTranches">
-    <limit-price :required="true" label=""/>
-    <limit-price :show-price="false" store-var="limitPrice2" :required="true" label=""/>
+  <order title="Ladder" subtitle="Multiple price levels" :tranches="buildTranches" :valid="validOrder">
+    <limit-price :required="true" label="start price" :show-price="false"/>
+    <limit-price store-var="limitPrice2" :required="true" label="end price"/>
+    <v-text-field label='Parts' type="number" step="1" aria-valuemin="0" min="1" variant="outlined"
+                  v-model="num" />
+    <v-text-field label='Skew' type="number" step="10" aria-valuemin="0" min="-100" max="100" variant="outlined"
+                  v-model="skew" clearable @click:clear="skew=0" suffix="%"/>
+<!--    todo deadline -->
+    <v-table>
+      <thead>
+        <tr><td>Fraction</td><td>Amount</td><td>Price</td></tr>
+      </thead>
+      <tbody>
+        <tr v-for="(r,i) in rungsFmt">
+          <td>{{(100*fractions[i]).toFixed(1)}}%</td>
+          <td>{{(amounts[i]).toPrecision(5)}} {{os.amountToken.symbol}}</td>
+          <td>{{r}}</td>
+        </tr>
+      </tbody>
+    </v-table>
   </order>
 </template>
 
 <script setup>
-import {useStore} from "@/store/store";
+import {useOrderStore} from "@/store/store";
 import LimitPrice from "@/components/LimitPrice.vue";
 import Order from "@/components/Order.vue";
+import {computed, ref} from "vue";
+import {newTimeConstraint, TimeMode} from "@/blockchain/orderlib.js";
+import {limitConstraint, maxFraction} from "@/orderbuild.js";
+import {validateMax} from "@/validate.js";
 
-const s = useStore()
+const os = useOrderStore()
+
+const num = ref(3)
+const skew = ref(0)
+const rungs = computed(()=>{
+  const n = num.value;
+  const a = parseFloat(os.limitPrice);
+  const b = parseFloat(os.limitPrice2);
+  if( n < 1 || !a || !b ) return []
+  if( n === 1 ) return [(a+b)/2]
+  // num >= 2
+  const result = []
+  const delta = (b-a)/(n-1)
+  for( let i=0; i<n; i++ )
+    result.push(a+i*delta)
+  return result
+})
+const rungsFmt = computed(()=>{
+  return rungs.value.map((r)=>r.toPrecision(5)) // todo precisions
+})
+const fractions = computed(()=>{
+  const n = num.value
+  const s = skew.value / 100
+  const result = []
+  if( s === 1 ) {
+    result.push(1)
+    for( let i=1; i<n; i++ )
+      result.push(0)
+  }
+  else if( s === -1 ) {
+    for( let i=1; i<n; i++ )
+      result.push(0)
+    result.push(1)
+  }
+  else {
+    const mean = 1/n
+    for( let i=0; i<n; i++ )
+      result.push( mean * ( 1 - s * (2*i/(n-1)-1) ) )
+  }
+  return result
+})
+const amounts = computed( ()=>fractions.value.map((f)=>f*os.amount) )
 
 function buildTranches() {
   const ts = []
+  const n = num.value
+  const mf = Number(maxFraction)
+  for( let i=0; i<n; i++ ) {
+    // todo optional deadline
+    const cs = [limitConstraint(rungs.value[i])]
+    const fraction = Math.min(mf, Math.ceil(mf * fractions.value[i]) )
+    ts.push([fraction, cs])
+  }
   return ts
 }
 
+function validOrder() {
+  return os.validOrder
+}
+
 </script>
 
 <style scoped lang="scss">

src/components/LimitPrice.vue

@@ -7,7 +7,7 @@
         {{ os.pairSymbol }}
       </v-btn>
     </template>
-    <template #details style="flex-direction: column-reverse">
+    <template v-if="showPrice" #details style="flex-direction: column-reverse">
       <div>
         Current price&nbsp;<route-price :inverted="routeInverted(os.route)" :route="os.route" class="text-green"/>
       </div>

src/components/NewOrder.vue

@@ -1,15 +1,51 @@
 <template>
-  <v-btn prepend-icon="mdi-plus" text="New Order"/>
+  <div class="d-inline-flex">
+    <btn icon="mdi-plus" color="green" @click="show=true">New Order</btn>
+    <v-dialog v-model="show" width="auto">
+      <v-card>
+        <v-card-item class="d-flex">
+
+          <v-card variant="elevated"
+                  prepend-icon="mdi-clock-outline" title="DCA"
+                  subtitle="Spread order across time"
+                  text="The DCA order gives you a Dollar Cost Average (DCA) or a Time Weighted Average
+                   Price (TWAP) by splitting the order amount into multiple parts executed at regular time intervals.">
+            <v-card-actions><btn icon="mdi-clock-outline" text="DCA" @click="$router.push('/twap')"/></v-card-actions>
+          </v-card>
+
+          <v-card variant="elevated"
+                  prepend-icon="mdi-menu" title="Ladder"
+                  subtitle="Multiple price levels"
+                  text="The Ladder order helps catch wicks and other reversals by splitting the order amount across
+                   multiple price levels. The amounts may be weighted towards one end of the ladder, to either have
+                   a larger filled amount on a shallow reversal, or a larger amount at a better price that might not
+                   be reached.">
+            <v-card-actions><btn icon="mdi-menu" text="Ladder" @click="$router.push('/ladder')"/></v-card-actions>
+          </v-card>
+
+        </v-card-item>
+        <v-card-item class="mb-3"><v-btn variant="outlined" prepend-icon="mdi-cancel" color="red" @click="show=false">Cancel</v-btn></v-card-item>
+      </v-card>
+    </v-dialog>
+  </div>
 </template>
 
 <script setup>
 import {useStore} from "@/store/store";
+import {ref} from "vue";
+import Btn from "@/components/Btn.vue";
 
 const s = useStore()
+const show = ref(false)
 
 </script>
 
 <style scoped lang="scss">
 @use "src/styles/vars" as *;
 
+.v-card .v-card {
+  width: 20em;
+  margin: 2em;
+}
+
 </style>